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<?php
/* $Id: tbl_indexes.lib.php 8301 2006-01-17 17:03:02Z cybot_tm $ */
// vim: expandtab sw=4 ts=4 sts=4:
/**
* function library for handling table indexes
*/
/**
* Return a list of all index types
*
* @access public
* @return array Index types
* @author Garvin Hicking (pma@supergarv.de)
*/
function PMA_get_indextypes() {
return array(
'PRIMARY',
'INDEX',
'UNIQUE',
'FULLTEXT'
);
}
/**
* Function to get all index information from a certain table
*
* @param string Table name
* @param string Error URL
*
* @access public
* @return array Index keys
*/
function PMA_get_indexes($tbl_name, $err_url_0 = '') {
$tbl_local_query = 'SHOW KEYS FROM ' . PMA_backquote($tbl_name);
$tbl_result = PMA_DBI_query($tbl_local_query) or PMA_mysqlDie('', $tbl_local_query, '', $err_url_0);
$tbl_ret_keys = array();
while ($tbl_row = PMA_DBI_fetch_assoc($tbl_result)) {
$tbl_ret_keys[] = $tbl_row;
}
PMA_DBI_free_result($tbl_result);
return $tbl_ret_keys;
}
/**
* Function to check over array of indexes and look for common problems
*
* @param array Array of indexes
* @param boolean Whether to output HTML in table layout
*
* @access public
* @return string Output HTML
* @author Garvin Hicking (pma@supergarv.de)
*/
function PMA_check_indexes($idx_collection, $table = true) {
$index_types = PMA_get_indextypes();
$output = '';
if ( ! is_array($idx_collection) || empty($idx_collection['ALL'])) {
return $output;
}
foreach ($idx_collection['ALL'] AS $w_keyname => $w_count) {
if (isset($idx_collection['PRIMARY'][$w_keyname]) && (isset($idx_collection['INDEX'][$w_keyname]) || isset($idx_collection['UNIQUE'][$w_keyname]))) {
$output .= PMA_index_warning(sprintf($GLOBALS['strIndexWarningPrimary'], htmlspecialchars($w_keyname)), $table);
} elseif (isset($idx_collection['UNIQUE'][$w_keyname]) && isset($idx_collection['INDEX'][$w_keyname])) {
$output .= PMA_index_warning(sprintf($GLOBALS['strIndexWarningUnique'], htmlspecialchars($w_keyname)), $table);
}
foreach ($index_types AS $index_type) {
if (isset($idx_collection[$index_type][$w_keyname]) && $idx_collection[$index_type][$w_keyname] > 1) {
$output .= PMA_index_warning(sprintf($GLOBALS['strIndexWarningMultiple'], $index_type, htmlspecialchars($w_keyname)), $table);
}
}
}
return $output;
}
/**
* Loop array of returned index keys and extract key information to
* seperate arrays. Those arrays are passed by reference.
*
* @param array Referenced Array of indexes
* @param array Referenced return array
* @param array Referenced return array
* @param array Referenced return array
*
* @access public
* @return boolean void
* @author Garvin Hicking (pma@supergarv.de)
*/
function PMA_extract_indexes(&$ret_keys, &$indexes, &$indexes_info, &$indexes_data) {
if (!is_array($ret_keys)) {
return false;
}
$prev_index = '';
foreach ($ret_keys as $row) {
if ($row['Key_name'] != $prev_index ){
$indexes[] = $row['Key_name'];
$prev_index = $row['Key_name'];
}
$indexes_info[$row['Key_name']]['Sequences'][] = $row['Seq_in_index'];
$indexes_info[$row['Key_name']]['Non_unique'] = $row['Non_unique'];
if (isset($row['Cardinality'])) {
$indexes_info[$row['Key_name']]['Cardinality'] = $row['Cardinality'];
}
// I don't know what does following column mean....
// $indexes_info[$row['Key_name']]['Packed'] = $row['Packed'];
$indexes_info[$row['Key_name']]['Comment'] = (isset($row['Comment']))
? $row['Comment']
: '';
$indexes_info[$row['Key_name']]['Index_type'] = (isset($row['Index_type']))
? $row['Index_type']
: '';
$indexes_data[$row['Key_name']][$row['Seq_in_index']]['Column_name'] = $row['Column_name'];
if (isset($row['Sub_part'])) {
$indexes_data[$row['Key_name']][$row['Seq_in_index']]['Sub_part'] = $row['Sub_part'];
}
} // end while
return true;
}
/**
* Show index data and prepare returned collection array for index
* key checks.
*
* @param string $table The tablename
* @param array $indexes Referenced Array of indexes
* @param array $indexes_info Referenced info array
* @param array $indexes_data Referenced data array
* @param boolean $display_html Output HTML code, or just return collection array?
* @param boolean $print_mode
* @access public
* @return array Index collection array
* @author Garvin Hicking (pma@supergarv.de)
*/
function PMA_show_indexes($table, &$indexes, &$indexes_info, &$indexes_data, $display_html = true, $print_mode = false) {
$idx_collection = array();
$odd_row = true;
foreach ($indexes as $index_name) {
if ($display_html) {
$row_span = ' rowspan="' . count($indexes_info[$index_name]['Sequences']) . '" ';
echo ' <tr class="' . ( $odd_row ? 'odd' : 'even' ) . '">' . "\n";
echo ' <th ' . $row_span . '>' . "\n"
. ' ' . htmlspecialchars($index_name) . "\n"
. ' </th>' . "\n";
}
if ((PMA_MYSQL_INT_VERSION < 40002 && $indexes_info[$index_name]['Comment'] == 'FULLTEXT')
|| (PMA_MYSQL_INT_VERSION >= 40002 && $indexes_info[$index_name]['Index_type'] == 'FULLTEXT')) {
$index_type = 'FULLTEXT';
} elseif ($index_name == 'PRIMARY') {
$index_type = 'PRIMARY';
} elseif ($indexes_info[$index_name]['Non_unique'] == '0') {
$index_type = 'UNIQUE';
} else {
$index_type = 'INDEX';
}
if ($display_html) {
echo ' <td ' . $row_span . '>' . "\n"
. ' ' . $index_type . '</td>' . "\n";
echo ' <td ' . $row_span . ' align="right">' . "\n"
. ' ' . (isset($indexes_info[$index_name]['Cardinality']) ? $indexes_info[$index_name]['Cardinality'] : $GLOBALS['strNone']) . ' ' . "\n"
. ' </td>' . "\n";
if (!$print_mode) {
echo ' <td ' . $row_span . '>' . "\n"
. ' <a href="tbl_indexes.php?' . $GLOBALS['url_query'] . '&index=' . urlencode($index_name) . '">' . $GLOBALS['edit_link_text'] . '</a>' . "\n"
. ' </td>' . "\n";
if ($index_name == 'PRIMARY') {
$local_query = urlencode('ALTER TABLE ' . PMA_backquote($table) . ' DROP PRIMARY KEY');
$js_msg = 'ALTER TABLE ' . PMA_jsFormat($table) . ' DROP PRIMARY KEY';
$zero_rows = urlencode($GLOBALS['strPrimaryKeyHasBeenDropped']);
} else {
$local_query = urlencode('ALTER TABLE ' . PMA_backquote($table) . ' DROP INDEX ' . PMA_backquote($index_name));
$js_msg = 'ALTER TABLE ' . PMA_jsFormat($table) . ' DROP INDEX ' . PMA_jsFormat($index_name);
$zero_rows = urlencode(sprintf($GLOBALS['strIndexHasBeenDropped'], htmlspecialchars($index_name)));
}
echo ' <td ' . $row_span . '>' . "\n"
. ' <a href="sql.php?' . $GLOBALS['url_query'] . '&sql_query=' . $local_query . '&zero_rows=' . $zero_rows . '" onclick="return confirmLink(this, \'' . $js_msg . '\')">' . $GLOBALS['drop_link_text'] . '</a>' . "\n"
. ' </td>' . "\n";
}
}
foreach ($indexes_info[$index_name]['Sequences'] AS $row_no => $seq_index) {
$col_name = $indexes_data[$index_name][$seq_index]['Column_name'];
if ($row_no == 0) {
if (isset($idx_collection[$index_type][$col_name])) {
$idx_collection[$index_type][$col_name]++;
} else {
$idx_collection[$index_type][$col_name] = 1;
}
if (isset($idx_collection['ALL'][$col_name])) {
$idx_collection['ALL'][$col_name]++;
} else {
$idx_collection['ALL'][$col_name] = 1;
}
}
if ($display_html) {
if ($row_no > 0) {
echo ' <tr class="' . ( $odd_row ? 'odd' : 'even' ) . '">' . "\n";
}
if ( isset($indexes_data[$index_name][$seq_index]['Sub_part'])
&& strlen($indexes_data[$index_name][$seq_index]['Sub_part']) ) {
echo ' <td>' . $col_name . '</td>' . "\n";
echo ' <td align="right">' . "\n"
. ' ' . $indexes_data[$index_name][$seq_index]['Sub_part'] . "\n"
. ' </td>' . "\n";
echo ' </tr>' . "\n";
} else {
echo ' <td colspan="2">' . "\n"
. ' ' . htmlspecialchars($col_name) . "\n"
. ' </td>' . "\n";
echo ' </tr>' . "\n";
}
}
} // end foreach $indexes_info[$index_name]['Sequences']
$odd_row = ! $odd_row;
} // end while
return $idx_collection;
}
/**
* Function to emit a index warning
*
* @author Garvin Hicking (pma@supergarv.de)
* @access public
* @param string $string Message string
* @param boolean $table Whether to output HTML in table layout
* @return string Output HTML
*/
function PMA_index_warning($string, $table = true) {
$output = '<div class="warning">' . $string . '</div>';
if ( $table ) {
$output = '<tr><td colspan=7">' . $output . '</td></tr>';
}
return $output . "\n";
}
?>
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